Thermostat



A. A. DICKE THERIIOSTAT July 12, 1932.

Filed Nov. 8, 1927 changes of temperature in the room or" other placewhere the thermostat is situated being caused to control electriccircuits by means time.

Patented July 12, 1932 2 UNITE STATES.

PATENT :OFFICE ALLEN mmcxn, or mon rcmm, N W JERSEY, ASSIGNOR TO mommaHEAT REGU- LATOR COMPANY, A CORPORATION OF NEW JERSEY Application filedNovember :8, 1927. Serial No. 231,885.

My invention in its complete embodiment relates to that class ofthermostats -1 n whicha clock mechanism is employed for the purpose ofchanging the adjustment of the thermostatic element at a predeterminedThis device is employed frequently in connection with damper controllingmechanism operatively' connected with a heat ing plant or furnacefonheatingidwellings and other buildings, or with controllingmechanismfor valves for heating or cooling systems or in otherconnections, the movement of the thermostatic element under of whichsuch damper or valve 'controlling mechanisms are brought into operation,the

thermostatic element being adjustable so as "to effect the change in itselectrical 'ClICllllZS at. different degrees of temperature and theclock mechanism being employed. to effect desired adjustments of thethermostatic element at predeterminedtimes. v p s invention consists inthe novel feature hereinafter described reference being had toftheaccompanying drawing which shows one embodi'ment'of myinventionselfected by .me for purposes of illustrat on and the saidinvention is fully "disclosed in the following description and claims. pp I An object of my invention is to simplify and improve the devicesheretoforejproposed tionsi Further the invention consists in varlouscombinations and constructions, all'as hereinafter described andparticularly pointed out'in the claims. I In the accompanying drawing,

, forming part of the specification,

Figure 1 is a side elevation, of one illussection.

In said drawing the numeral 11 represents the main frame which ispreferably made of a casting of iron or other metal or alloy or anynonmetallic plastic material like bakelite. The upper part thereofprojectsforwardly to form a mechanism casing and preferably bears on itsfront face a thermometer 12 having the usualtube and temperature scaleas shown. The lower part, preferably of ring form, serves to support theclockin a manner and for a purpose to be set forth later. The'thermoresponsive and electrical mechanism is preferably carried by aback plate 13 which may be supported on lugs 14 and'15 being clampedthereto by insulated relation on a lever 24:, pivoted at 25 tion endingin the pointer 27. It will be seen that as this pointer is moved overthe scale it will move the contacts 20 and '21 in relation to the finger19. To provide a convenient flexible electrical connection between themovable posts 22 and 23 and the cable leading to the motor, the backplate is preferably provided with two binding posts 28 and 29 mounted onthe back plate in insulated relation. These binding posts are connectedto the contact supporting posts 22 and 23 by flexible conductors 30.Connected to the binding posts 28 and 29 are the conductors 31 and 32.The outer end of the supporting post 17 is preferably threaded andcarries the nut 33, thus forming a third binding post for the conductor34, the three conductors are preferably formed into a cable 35 whichleads to the motor the operations of which are to be controlled.

Due to the arrangement and action of the thermoresponsive element 18,which may be of the usual bimetallic type or its equivalent, the finger19 moves to the right when the temperature rises and to the left whenthe temperature drops. When the temperature rises contact is made withcontact point 21 thus establishing a circuit through conductors 32 and34, resulting in the operation of the distant motor to reduce the draftsor to reduce the gaseous, liquid or solid fuel supply. Likewise a dropin the temperature establishes contact between finger 19 and contact 20,providing a circuitt-hrough conductors 31 and 3 causing the distantmotor to operate to increase the heat supply.

The contact screws may be adjusted by inserting a suitable instrument,as a small screw driver through one of the holes 40 in the sides of thecasing- To facilitate this adjustment the casing front is provided witha large opening 41, normally covered by the thermometer. WVhen thelatter is removed the contact screws are readily accessible.

The bottom of the casing is partly closed by the wall 42. Circulation ofair through the casing and about the element 18 is provided for. It mayenter to the rear of the wall 42 and leave through the openings 43 atthe top of the casings. Other ventilating openings may be provided for.

The means for adjusting the lever 24 under time control will now bedescribed. For this purpose a suitable clock 50, in this instance aclock of the one day alarm type, is employed. This may be hinged to themain frame as at 51. For this and other purposes there is provided aback plate 52 of generally annular form, secured to the clock by screws53. This is preferably formed with a right angle extension 54: to whichthe hinge 51 is attached. The other edge of the plate co- 4 operateswith a clasp 55 which holds the clock in the position shown. It may alsobe provided with a tab cooperating with the recessed-lug 56, foraccurate alignment of the clock. The back plate is cut away to pro videaccess to the time winding key 57 and i to the alarm winding key 58 andthe other usual control devices of the clock. Near the key 58 it is cutaway in such form as to leave a tab 59 lying in the path of both bladesof the key 58, thus serving as a'stop. to limit the motion of the key,when turned in the winding direction, at the position shown in dottedlines and, when turned in the opposite direction during the operation ofthe alarm mechanism in the usual, known way, its mo tion is stopped inthe position shown in full lines.

The lever 24 is formed with an extension 24a having a forwardlyprojecting foot 24?).

In the evening, at about the retiring hour the user swings the clock onits hinge, winds the key 57 and also the key 58 from the full lineposition to the dotted line position. Either before the clock isreturned to normal position or. thereafter the lever 24 is moved to theleft, (Figs. 2 and 4). The latter action results in the operation of thedistant motor to reduce the heat supply.

In the morning, at say 6 oclock, as shown in Figure 2, the alarmmechanism is released. and as a result the key 58 is turned from the"dotted line position to the full line position. In so doing it engagesthe foot 246 and moves the lever 24 toward the left in Figure 3 (to theright as viewed in: Figs. 2 and 4) to the central or normal positionshown. As the temperature'has. in most instances dropped belownormal'during the night the movement to the normal position results inthe operation of the motor to increase the heat supply. This results inthe raising of the temperature to approximately normal at the risinghour. Furthermore the parts are now adjusted to maintain the desirednormal temperature during the entire day.

What I claim is:

1. In a thermostat, a frame, means adapted for attaching the frame to asupport, means forming a part of said frame for supporting a clock, saidframe being formed with means 105 for supporting a thermoresponsivemechanism and with a mechanism receiving casing, said casing beingformed with an opening to permit viewing of and to give access to said.mechanism, and a thermometer mounting de- U8 tachably attached to saidcasing and serving to cover said openin 2. In a thermostat, a frame,means adapted for attaching the frame to a sup port, means forming apart of said frame for 115 supporting a clock, said frame being formedwith means for supporting thermoresponsive mechanism, which mechanismcomprisesv opposed contact screws disposed transversely, and with amechanism receiving casing, said 120 casing being formed with smallopenings to permit the insertion of a tool to adjust said contactscrews.

3. In a thermostat, a frame, means adapted for attaching the frame to asup- 125 port, means forming a part of said frame for supporting aclock, said frame being formed with means for supportingthermoresponsive mechanism, which mechanism comprises opposed contactscrews disposed transverse- 180 ly, and with a mechanism receivingcasing, said casing being formed with small openings to permit theinsertion of a tool to adjust said contact screws, and being also formedwith a large opening to permit viewing of and giving access to themechanism while it is being adjusted by said tool.

4:. In a thermostat, a frame, means adapted for attaching the frame to asupport, means forming a part of said frame for supporting a clock, saidframe being formed with means for supporting thermoresponsive mechanism,which mechanism comprises opposed contact screws disposed transverse-V 1ly, and with a mechanism receiving casing,

said casing being. formed with small openings to permit the insertion ofa tool to adjust said contact screws, and being also formed with a largeopening to permit viewing of and giving access to the mechanism while itis being adjusted by said tool and a thermometer mounting attached tosaid casing and serving to cover said openin ALLEN A. DI KE.

CERTIFICATE OF GORREGTION.

Patent No. 1,866,548. JULY 12, 1932.

ALLEN A. DIGKE.

It is hereby certified that the name cf the assignee in the abovenumbered patent was erroneously described and specified as "Pioneer HeatRegulator Company", whereas said name should have been described andspecified as Pioneer Heat Regulator Corporation, as shown by the reccrdsof assignment in this office; and that the said Letters Patent should beread With this correction therein that the same may conform to therecord of the ease in the Patent Office.

Signed and sealed this 30th day of August, A. D. 1932.

M. J. Moore, (Seal) Acting Commissioner of Patents.

CERTIFICATE OF coaReoTtoN.

Patent No. 1, 866, 54s. JULY 12, 1932.

ALLEN A. DICKE.

It is hereby certified that the name of the assignee in the abovenumbered patent was erroneously described and specified as "Pioneer HeatRegulator Company", whereas said name should have bees described andspecified as Pioneer Heat Regulator Corporation, as shown by the recordsof assignment in this office; and that the said Letters Patent should beread. With this correction therein that the same may conform to therecord of the case in the Patent Office.

Signed and sealed this 30th day of August, A. D. 1932.

M. J. Moore, (Seal) Acting Gommissioner of Patents.

